I am currently considering the feasibility of a VM-based process sandbox for Linux. As such, I stumbled upon OSv and was attracted by its relative simplicity and low overhead compared to the Linux kernel. Since many normal applications require the syscalls that are (for good reason) not implemented in OSv, making a universally compatible sandbox requires making them available. >From that results my question: Are there any unforeseen obstacles to creating >an OSv fork that makes IPC across VMs and cloning a process into a new VM >possible, using grant pages (shared memory pages between Xen guests) for both? My assumption is that equal or greater effort would probably be needed to get Linux to do the same things.
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